Get involved Fundraise for us Fundraising events Great South Run 2018 The world's leading 10 mile running event returns to Portsmouth on Sunday 21 October 2018 and entries are now open. This fast and flat course starts and finishes on Southsea sea front, with beautiful views of the Solent. Participants are given special permission to run through Portsmouth Historic Dockyard, home to HMS Victory and the Mary Rose Museum. A total of 20,000 runners are expected to take to the streets and the Encephalitis Society is delighted to have FIVE places available. We do not want you to pay for your place - but we do ask that you commit to raising as much money as possible for the Encephalitis Society and its members. Register your place below. Sorry, this event is now sold out.